Sheet metal furnace baffle



April 10, 1951 D, AUFM N 2,548,312

SHEET METAL FURNACE BAFFLE Fild July 29, 1946 Patented Apr. 10, 1951 SHEET METAL FURNACE BAFFLE Daniel Kaufman, New Haven, Conn., assignor, by mesne assignments, to The Oil Equipment Manufacturing Corporation, New Haven, Conn., a corporation of Connecticut Application July 29, 1946, Serial No. 686,837

1 Claim. 1

This invention relates to a bafile or the like for furnaces, or to a method of making the same.

It particularly relates to a device to be supported in a combustion chamber above the flame or fuel therein to deflect the ascending products of combustion against the walls of the boiler or furnace to increase the efiiciency of the furnace and prevent heat losses from the furnace.

It is desirable in a device of this kind to be able to install it in the furnace after the latter is in place, or, in other words, to be able to insert it through the furnace door. However, as the firebox or combustion chamber is usually considerably larger than the furnace door, this cannot be done unless the device is made in parts or sections. One feature of the present invention is to provide a bailie member made of sheet material, such as sheet metal, and so constructed that it comprises substantially identical parts or sections which may be inserted through a furnace door and thereafter connected together to form the completed bafile.

One object of the invention is to provide a new and improved bafiie for combustion chambers of furnaces or boilers.

A still further object of the invention is to provide a furnace baffle of sheet metal, such as stainless steel, constructed in such a manner that it may be comprised of similar sections, which sections may be readily assembled and secured together within the chamber of the furnace.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a sectional view of a furnace showing the use of my improved baflie;

Fig. 2 is a top plan View of the bafile;

Fig. 3 is a sectional View on line 33 of Fig. 2;

Fig. 4 is a top plan View of one of the sections or parts of the baffie in flat form before it has been formed or bent into a substantially semi-conical shape;

Fig. 5 is a view of one of the sections of the baffle after it has been formed into its final shape;

Fig. 6 is a view of a roll assembly for forming the bafile sections from flat blanks;

Fig. 7 is a sectional view on line 'I-'I of Fig. 6; and

Fig. 8 is a view of a baifie section of modified form which may be formed by the roll shown in Figs. 6 and 7.

To illustrate a preferred embodiment of my invention, I have shown in Fig. 1 of the drawings a furnace I0 having a firebox or combustion chamber I I. An oil burner I2 is shown as being connected to the furnace, although it will be understood that my improved bafile may be employed with a furnace using other types of fuel.

The bafile I3 is shown within the combustion chamber and may be supported from the cross tubes [G by chains or cables I5 secured to eyes I6 connected to the bafiie sections, as will be hereinafter described.

The completed bafile I3 is shown particularly in Figs. 2 and 3, and, as shown in the latter figure, is of substantially conical form, the sides extending upwardly from the apex I! and having the eyes I6 connected thereto adjacent the outer edges of the walls.

As illustrated, the bafile member I3 is constructed of two substantially identical parts, one of which is designated at l8 in Fig. 4. This blank I8 is of initially fiat form and may be composed of sheet metal, such as stainless steel, for example, of the proper gauge.

This fiat sheet I8 is formed, as shown, into substantially semi-octagonal shape by cutting off the corners along the lines I9 and 20. It will be noted that the edge 2| extends continuously from one side to the other of the blank. Openings 23 may be formed in this fiat blank along the edge 2|. The two outer openings are spaced a slightly greater distance from the edge than the inner openings.

This blank is formed into substantially semiconical form, shown in Fig. 5 and designated by the reference numeral 22. This may be effected by bending the blank along the dotted lines 24, so that each of the sections will extend upwardly from the apex H, which is at the center of the edge 2|. The blank is now in the form shown in Fig. 5.

Two of such parts or sections 22, as shown in Fig. 5, are then brought together with their apices I! in juxtaposition, as shown in Fig. 2. It will be apparent that the edges 25 of the formed semi-conical section 22 will overlap the adjacent edges of the complementary section, as shown in Fig. 2. That is, while the apices I'I will merely be in juxtaposition, the sections of the edge 2| extending from these apices outwardly will overlap, so that the openings 23 of one section will register with those of the other section. The two sections may then be secured together by bolts 26 and the eyes I6 previously described.

It will be understood that the sections or parts 22 will usually be placed separately within the furnace chamber as they can be inserted singly through the door, and that they will be assembled and secured together within the furnace chamber as shown.

In Fig. 8 of the drawings, I have shown a slightly modified form of bafiie in which the two half sections are formed in more truly conical shape than the section 22. In this form of my invention a; flat;- blankis employed ,=similar s to that shown-in Fig. 4 and of sheet metal, such as stainless steel, as before. the blank being bent along certain straight' lines, it is rolled into semi-conical form -byi aset of rollers, hown generally in Figs. 6 and '7.

This roll stand comprises,.cooperatingeupper and lower rollers 28 and 29- anda'third roller-30 1 positioned opposite the bite between the'rollers 28 and 29. The roller 28 is of conical or tapered form, as shown, so that, when :the;flat; sheet: of material 18 is passed between the rollers 28 and 29, it will, by engagement with the cooperating 20 roll 30, be formed into-semi-conical shape, as

shown at 31.1 in Fig; 8.

This, as will be understood, will formone-half 'ofethe completed baffiarthe two sections of which willbe secured together as explained in connec- 25 .;tionwith'Figs. 2 to 5.

While I have shown and described some preferred embodiments of 1, my invention and described some preferred methods of carrying out my improved process, it will be understood 30 that the invention is not to be limited to the particular device shown-onto the particularsteps Instead, however, of m recited, but is capable of modification and variation within the spirit of the invention and within the scope of the claim.

What I claim is:

A baflie or the like for use in a combustion chamber, said baflie comprising two substantially identical sheet metal, substantially semi- ;octagon'al-members, each member beingbent up- ---edges into semi-pyramidal form, and means -opera tively; associated with said members for securing said members together with their apices abutting, and their adjacent edges overlapping in increasing amount from the apices outwardly. DANIEL KAUFMAN.

PREFERENCES CITED Theiollowing references are of record in the file of'this patent:

UNITED- STATES PATENTS Number Name Date -84.),294 Ware Apr, 2, 1907 1,137,689 Allsteadt Apr. 27, 1915 1,562,840 Maul Nov. 24, 1925 2,104,127 .l-Iickman Jan. 4, 1938 2,177,573 .sKormendi Oct. 24,v 1939 FOREIGN PATENTS Number Country Date 27,008 lsw eden June 12, 1909 

